зеркало из https://github.com/mozilla/gecko-dev.git
658 строки
17 KiB
C++
658 строки
17 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef mozilla_CmdLineAndEnvUtils_h
|
|
#define mozilla_CmdLineAndEnvUtils_h
|
|
|
|
// NB: This code may be used outside of xul and thus must not depend on XPCOM
|
|
|
|
#if defined(MOZILLA_INTERNAL_API)
|
|
# include "prenv.h"
|
|
# include "prprf.h"
|
|
# include <string.h>
|
|
#elif defined(XP_WIN)
|
|
# include <stdlib.h>
|
|
#endif
|
|
|
|
#if defined(XP_WIN)
|
|
# include "mozilla/UniquePtr.h"
|
|
# include "mozilla/Vector.h"
|
|
# include "mozilla/WinHeaderOnlyUtils.h"
|
|
|
|
# include <wchar.h>
|
|
# include <windows.h>
|
|
#endif // defined(XP_WIN)
|
|
|
|
#include "mozilla/MemoryChecking.h"
|
|
#include "mozilla/TypedEnumBits.h"
|
|
|
|
#include <ctype.h>
|
|
#include <stdint.h>
|
|
|
|
#ifndef NS_NO_XPCOM
|
|
# include "nsIFile.h"
|
|
# include "mozilla/AlreadyAddRefed.h"
|
|
#endif
|
|
|
|
// Undo X11/X.h's definition of None
|
|
#undef None
|
|
|
|
namespace mozilla {
|
|
|
|
enum ArgResult {
|
|
ARG_NONE = 0,
|
|
ARG_FOUND = 1,
|
|
ARG_BAD = 2 // you wanted a param, but there isn't one
|
|
};
|
|
|
|
template <typename CharT>
|
|
inline void RemoveArg(int& argc, CharT** argv) {
|
|
do {
|
|
*argv = *(argv + 1);
|
|
++argv;
|
|
} while (*argv);
|
|
|
|
--argc;
|
|
}
|
|
|
|
namespace internal {
|
|
|
|
template <typename FuncT, typename CharT>
|
|
static inline bool strimatch(FuncT aToLowerFn, const CharT* lowerstr,
|
|
const CharT* mixedstr) {
|
|
while (*lowerstr) {
|
|
if (!*mixedstr) return false; // mixedstr is shorter
|
|
if (static_cast<CharT>(aToLowerFn(*mixedstr)) != *lowerstr)
|
|
return false; // no match
|
|
|
|
++lowerstr;
|
|
++mixedstr;
|
|
}
|
|
|
|
if (*mixedstr) return false; // lowerstr is shorter
|
|
|
|
return true;
|
|
}
|
|
|
|
} // namespace internal
|
|
|
|
inline bool strimatch(const char* lowerstr, const char* mixedstr) {
|
|
return internal::strimatch(&tolower, lowerstr, mixedstr);
|
|
}
|
|
|
|
inline bool strimatch(const wchar_t* lowerstr, const wchar_t* mixedstr) {
|
|
return internal::strimatch(&towlower, lowerstr, mixedstr);
|
|
}
|
|
|
|
const wchar_t kCommandLineDelimiter[] = L" \t";
|
|
|
|
enum class FlagLiteral { osint, safemode };
|
|
|
|
template <typename CharT, FlagLiteral Literal>
|
|
inline const CharT* GetLiteral();
|
|
|
|
#define DECLARE_FLAG_LITERAL(enum_name, literal) \
|
|
template <> \
|
|
inline const char* GetLiteral<char, FlagLiteral::enum_name>() { \
|
|
return literal; \
|
|
} \
|
|
\
|
|
template <> \
|
|
inline const wchar_t* GetLiteral<wchar_t, FlagLiteral::enum_name>() { \
|
|
return L##literal; \
|
|
}
|
|
|
|
DECLARE_FLAG_LITERAL(osint, "osint")
|
|
DECLARE_FLAG_LITERAL(safemode, "safe-mode")
|
|
|
|
enum class CheckArgFlag : uint32_t {
|
|
None = 0,
|
|
// (1 << 0) Used to be CheckOSInt
|
|
RemoveArg = (1 << 1) // Remove the argument from the argv array.
|
|
};
|
|
|
|
MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(CheckArgFlag)
|
|
|
|
/**
|
|
* Check for a commandline flag. If the flag takes a parameter, the
|
|
* parameter is returned in aParam. Flags may be in the form -arg or
|
|
* --arg (or /arg on win32).
|
|
*
|
|
* @param aArgc The argc value.
|
|
* @param aArgv The original argv.
|
|
* @param aArg the parameter to check. Must be lowercase.
|
|
* @param aParam if non-null, the -arg <data> will be stored in this pointer.
|
|
* This is *not* allocated, but rather a pointer to the argv data.
|
|
* @param aFlags Flags @see CheckArgFlag
|
|
*/
|
|
template <typename CharT>
|
|
inline ArgResult CheckArg(int& aArgc, CharT** aArgv, const CharT* aArg,
|
|
const CharT** aParam = nullptr,
|
|
CheckArgFlag aFlags = CheckArgFlag::RemoveArg) {
|
|
MOZ_ASSERT(aArgv && aArg);
|
|
|
|
CharT** curarg = aArgv + 1; // skip argv[0]
|
|
ArgResult ar = ARG_NONE;
|
|
|
|
while (*curarg) {
|
|
CharT* arg = curarg[0];
|
|
|
|
if (arg[0] == '-'
|
|
#if defined(XP_WIN)
|
|
|| *arg == '/'
|
|
#endif
|
|
) {
|
|
++arg;
|
|
|
|
if (*arg == '-') {
|
|
++arg;
|
|
}
|
|
|
|
if (strimatch(aArg, arg)) {
|
|
if (aFlags & CheckArgFlag::RemoveArg) {
|
|
RemoveArg(aArgc, curarg);
|
|
} else {
|
|
++curarg;
|
|
}
|
|
|
|
if (!aParam) {
|
|
ar = ARG_FOUND;
|
|
break;
|
|
}
|
|
|
|
if (*curarg) {
|
|
if (**curarg == '-'
|
|
#if defined(XP_WIN)
|
|
|| **curarg == '/'
|
|
#endif
|
|
) {
|
|
return ARG_BAD;
|
|
}
|
|
|
|
*aParam = *curarg;
|
|
|
|
if (aFlags & CheckArgFlag::RemoveArg) {
|
|
RemoveArg(aArgc, curarg);
|
|
}
|
|
|
|
ar = ARG_FOUND;
|
|
break;
|
|
}
|
|
|
|
return ARG_BAD;
|
|
}
|
|
}
|
|
|
|
++curarg;
|
|
}
|
|
|
|
return ar;
|
|
}
|
|
|
|
template <typename CharT>
|
|
inline void EnsureCommandlineSafe(int& aArgc, CharT** aArgv,
|
|
const CharT** aAcceptableArgs) {
|
|
// We expect either no -osint, or the full commandline to be:
|
|
// app -osint
|
|
// followed by one of the arguments listed in aAcceptableArgs,
|
|
// followed by one parameter for that arg.
|
|
// If this varies, we abort to avoid abuse of other commandline handlers
|
|
// from apps that do a poor job escaping links they give to the OS.
|
|
|
|
const CharT* osintLit = GetLiteral<CharT, FlagLiteral::osint>();
|
|
|
|
if (CheckArg(aArgc, aArgv, osintLit, static_cast<const CharT**>(nullptr),
|
|
CheckArgFlag::None) == ARG_FOUND) {
|
|
// There should be 4 items left (app name + -osint + (acceptable arg) +
|
|
// param)
|
|
if (aArgc != 4) {
|
|
exit(127);
|
|
}
|
|
|
|
// The first should be osint.
|
|
CharT* arg = aArgv[1];
|
|
if (*arg != '-'
|
|
#ifdef XP_WIN
|
|
&& *arg != '/'
|
|
#endif
|
|
) {
|
|
exit(127);
|
|
}
|
|
++arg;
|
|
if (*arg == '-') {
|
|
++arg;
|
|
}
|
|
if (!strimatch(osintLit, arg)) {
|
|
exit(127);
|
|
}
|
|
// Strip it:
|
|
RemoveArg(aArgc, aArgv + 1);
|
|
|
|
// Now only an acceptable argument and a parameter for it should be left:
|
|
arg = aArgv[1];
|
|
if (*arg != '-'
|
|
#ifdef XP_WIN
|
|
&& *arg != '/'
|
|
#endif
|
|
) {
|
|
exit(127);
|
|
}
|
|
++arg;
|
|
if (*arg == '-') {
|
|
++arg;
|
|
}
|
|
bool haveAcceptableArg = false;
|
|
const CharT** acceptableArg = aAcceptableArgs;
|
|
while (*acceptableArg) {
|
|
if (strimatch(*acceptableArg, arg)) {
|
|
haveAcceptableArg = true;
|
|
break;
|
|
}
|
|
acceptableArg++;
|
|
}
|
|
if (!haveAcceptableArg) {
|
|
exit(127);
|
|
}
|
|
// The param that is passed afterwards shouldn't be another switch:
|
|
arg = aArgv[2];
|
|
if (*arg == '-'
|
|
#ifdef XP_WIN
|
|
|| *arg == '/'
|
|
#endif
|
|
) {
|
|
exit(127);
|
|
}
|
|
}
|
|
// Either no osint, so nothing to do, or we ensured nothing nefarious was
|
|
// passed.
|
|
}
|
|
|
|
#if defined(XP_WIN)
|
|
|
|
namespace internal {
|
|
|
|
/**
|
|
* Get the length that the string will take and takes into account the
|
|
* additional length if the string needs to be quoted and if characters need to
|
|
* be escaped.
|
|
*/
|
|
inline int ArgStrLen(const wchar_t* s) {
|
|
int backslashes = 0;
|
|
int i = wcslen(s);
|
|
bool hasDoubleQuote = wcschr(s, L'"') != nullptr;
|
|
// Only add doublequotes if the string contains a space or a tab
|
|
bool addDoubleQuotes = wcspbrk(s, kCommandLineDelimiter) != nullptr;
|
|
|
|
if (addDoubleQuotes) {
|
|
i += 2; // initial and final duoblequote
|
|
}
|
|
|
|
if (hasDoubleQuote) {
|
|
while (*s) {
|
|
if (*s == '\\') {
|
|
++backslashes;
|
|
} else {
|
|
if (*s == '"') {
|
|
// Escape the doublequote and all backslashes preceding the
|
|
// doublequote
|
|
i += backslashes + 1;
|
|
}
|
|
|
|
backslashes = 0;
|
|
}
|
|
|
|
++s;
|
|
}
|
|
}
|
|
|
|
return i;
|
|
}
|
|
|
|
/**
|
|
* Copy string "s" to string "d", quoting the argument as appropriate and
|
|
* escaping doublequotes along with any backslashes that immediately precede
|
|
* doublequotes.
|
|
* The CRT parses this to retrieve the original argc/argv that we meant,
|
|
* see STDARGV.C in the MSVC CRT sources.
|
|
*
|
|
* @return the end of the string
|
|
*/
|
|
inline wchar_t* ArgToString(wchar_t* d, const wchar_t* s) {
|
|
int backslashes = 0;
|
|
bool hasDoubleQuote = wcschr(s, L'"') != nullptr;
|
|
// Only add doublequotes if the string contains a space or a tab
|
|
bool addDoubleQuotes = wcspbrk(s, kCommandLineDelimiter) != nullptr;
|
|
|
|
if (addDoubleQuotes) {
|
|
*d = '"'; // initial doublequote
|
|
++d;
|
|
}
|
|
|
|
if (hasDoubleQuote) {
|
|
int i;
|
|
while (*s) {
|
|
if (*s == '\\') {
|
|
++backslashes;
|
|
} else {
|
|
if (*s == '"') {
|
|
// Escape the doublequote and all backslashes preceding the
|
|
// doublequote
|
|
for (i = 0; i <= backslashes; ++i) {
|
|
*d = '\\';
|
|
++d;
|
|
}
|
|
}
|
|
|
|
backslashes = 0;
|
|
}
|
|
|
|
*d = *s;
|
|
++d;
|
|
++s;
|
|
}
|
|
} else {
|
|
wcscpy(d, s);
|
|
d += wcslen(s);
|
|
}
|
|
|
|
if (addDoubleQuotes) {
|
|
*d = '"'; // final doublequote
|
|
++d;
|
|
}
|
|
|
|
return d;
|
|
}
|
|
|
|
} // namespace internal
|
|
|
|
/**
|
|
* Creates a command line from a list of arguments.
|
|
*
|
|
* @param argc Number of elements in |argv|
|
|
* @param argv Array of arguments
|
|
* @param aArgcExtra Number of elements in |aArgvExtra|
|
|
* @param aArgvExtra Optional array of arguments to be appended to the resulting
|
|
* command line after those provided by |argv|.
|
|
*/
|
|
inline UniquePtr<wchar_t[]> MakeCommandLine(
|
|
int argc, const wchar_t* const* argv, int aArgcExtra = 0,
|
|
const wchar_t* const* aArgvExtra = nullptr) {
|
|
int i;
|
|
int len = 0;
|
|
|
|
// The + 1 for each argument reserves space for either a ' ' or the null
|
|
// terminator, depending on the position of the argument.
|
|
for (i = 0; i < argc; ++i) {
|
|
len += internal::ArgStrLen(argv[i]) + 1;
|
|
}
|
|
|
|
for (i = 0; i < aArgcExtra; ++i) {
|
|
len += internal::ArgStrLen(aArgvExtra[i]) + 1;
|
|
}
|
|
|
|
// Protect against callers that pass 0 arguments
|
|
if (len == 0) {
|
|
len = 1;
|
|
}
|
|
|
|
auto s = MakeUnique<wchar_t[]>(len);
|
|
if (!s) {
|
|
return s;
|
|
}
|
|
|
|
int totalArgc = argc + aArgcExtra;
|
|
|
|
wchar_t* c = s.get();
|
|
for (i = 0; i < argc; ++i) {
|
|
c = internal::ArgToString(c, argv[i]);
|
|
if (i + 1 != totalArgc) {
|
|
*c = ' ';
|
|
++c;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < aArgcExtra; ++i) {
|
|
c = internal::ArgToString(c, aArgvExtra[i]);
|
|
if (i + 1 != aArgcExtra) {
|
|
*c = ' ';
|
|
++c;
|
|
}
|
|
}
|
|
|
|
*c = '\0';
|
|
|
|
return s;
|
|
}
|
|
|
|
inline bool SetArgv0ToFullBinaryPath(wchar_t* aArgv[]) {
|
|
if (!aArgv) {
|
|
return false;
|
|
}
|
|
|
|
UniquePtr<wchar_t[]> newArgv_0(GetFullBinaryPath());
|
|
if (!newArgv_0) {
|
|
return false;
|
|
}
|
|
|
|
// We intentionally leak newArgv_0 into argv[0]
|
|
aArgv[0] = newArgv_0.release();
|
|
MOZ_LSAN_INTENTIONALLY_LEAK_OBJECT(aArgv[0]);
|
|
return true;
|
|
}
|
|
|
|
# if defined(MOZILLA_INTERNAL_API)
|
|
// This class converts a command line string into an array of the arguments.
|
|
// It's basically the opposite of MakeCommandLine. However, the behavior is
|
|
// different from ::CommandLineToArgvW in several ways, such as escaping a
|
|
// backslash or quoting an argument containing whitespaces.
|
|
template <typename T>
|
|
class CommandLineParserWin final {
|
|
int mArgc;
|
|
T** mArgv;
|
|
|
|
void Release() {
|
|
if (mArgv) {
|
|
while (mArgc) {
|
|
delete[] mArgv[--mArgc];
|
|
}
|
|
delete[] mArgv;
|
|
mArgv = nullptr;
|
|
}
|
|
}
|
|
|
|
public:
|
|
CommandLineParserWin() : mArgc(0), mArgv(nullptr) {}
|
|
~CommandLineParserWin() { Release(); }
|
|
|
|
CommandLineParserWin(const CommandLineParserWin&) = delete;
|
|
CommandLineParserWin(CommandLineParserWin&&) = delete;
|
|
CommandLineParserWin& operator=(const CommandLineParserWin&) = delete;
|
|
CommandLineParserWin& operator=(CommandLineParserWin&&) = delete;
|
|
|
|
int Argc() const { return mArgc; }
|
|
const T* const* Argv() const { return mArgv; }
|
|
|
|
void HandleCommandLine(const T* aCmdLineString) {
|
|
Release();
|
|
|
|
int justCounting = 1;
|
|
// Flags, etc.
|
|
int init = 1;
|
|
int between, quoted, bSlashCount;
|
|
const T* p;
|
|
nsTAutoString<T> arg;
|
|
|
|
// Parse command line args according to MS spec
|
|
// (see "Parsing C++ Command-Line Arguments" at
|
|
// http://msdn.microsoft.com/library/devprods/vs6/visualc/vclang/_pluslang_parsing_c.2b2b_.command.2d.line_arguments.htm).
|
|
// We loop if we've not finished the second pass through.
|
|
while (1) {
|
|
// Initialize if required.
|
|
if (init) {
|
|
p = aCmdLineString;
|
|
between = 1;
|
|
mArgc = quoted = bSlashCount = 0;
|
|
|
|
init = 0;
|
|
}
|
|
if (between) {
|
|
// We are traversing whitespace between args.
|
|
// Check for start of next arg.
|
|
if (*p != 0 && !wcschr(kCommandLineDelimiter, *p)) {
|
|
// Start of another arg.
|
|
between = 0;
|
|
arg.Truncate();
|
|
switch (*p) {
|
|
case '\\':
|
|
// Count the backslash.
|
|
bSlashCount = 1;
|
|
break;
|
|
case '"':
|
|
// Remember we're inside quotes.
|
|
quoted = 1;
|
|
break;
|
|
default:
|
|
// Add character to arg.
|
|
arg += *p;
|
|
break;
|
|
}
|
|
} else {
|
|
// Another space between args, ignore it.
|
|
}
|
|
} else {
|
|
// We are processing the contents of an argument.
|
|
// Check for whitespace or end.
|
|
if (*p == 0 || (!quoted && wcschr(kCommandLineDelimiter, *p))) {
|
|
// Process pending backslashes (interpret them
|
|
// literally since they're not followed by a ").
|
|
while (bSlashCount) {
|
|
arg += '\\';
|
|
bSlashCount--;
|
|
}
|
|
// End current arg.
|
|
if (!justCounting) {
|
|
mArgv[mArgc] = new T[arg.Length() + 1];
|
|
memcpy(mArgv[mArgc], arg.get(), (arg.Length() + 1) * sizeof(T));
|
|
}
|
|
mArgc++;
|
|
// We're now between args.
|
|
between = 1;
|
|
} else {
|
|
// Still inside argument, process the character.
|
|
switch (*p) {
|
|
case '"':
|
|
// First, digest preceding backslashes (if any).
|
|
while (bSlashCount > 1) {
|
|
// Put one backsplash in arg for each pair.
|
|
arg += '\\';
|
|
bSlashCount -= 2;
|
|
}
|
|
if (bSlashCount) {
|
|
// Quote is literal.
|
|
arg += '"';
|
|
bSlashCount = 0;
|
|
} else {
|
|
// Quote starts or ends a quoted section.
|
|
if (quoted) {
|
|
// Check for special case of consecutive double
|
|
// quotes inside a quoted section.
|
|
if (*(p + 1) == '"') {
|
|
// This implies a literal double-quote. Fake that
|
|
// out by causing next double-quote to look as
|
|
// if it was preceded by a backslash.
|
|
bSlashCount = 1;
|
|
} else {
|
|
quoted = 0;
|
|
}
|
|
} else {
|
|
quoted = 1;
|
|
}
|
|
}
|
|
break;
|
|
case '\\':
|
|
// Add to count.
|
|
bSlashCount++;
|
|
break;
|
|
default:
|
|
// Accept any preceding backslashes literally.
|
|
while (bSlashCount) {
|
|
arg += '\\';
|
|
bSlashCount--;
|
|
}
|
|
// Just add next char to the current arg.
|
|
arg += *p;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
// Check for end of input.
|
|
if (*p) {
|
|
// Go to next character.
|
|
p++;
|
|
} else {
|
|
// If on first pass, go on to second.
|
|
if (justCounting) {
|
|
// Allocate argv array.
|
|
mArgv = new T*[mArgc];
|
|
|
|
// Start second pass
|
|
justCounting = 0;
|
|
init = 1;
|
|
} else {
|
|
// Quit.
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
};
|
|
# endif // defined(MOZILLA_INTERNAL_API)
|
|
|
|
#endif // defined(XP_WIN)
|
|
|
|
// SaveToEnv and EnvHasValue are only available on Windows or when
|
|
// MOZILLA_INTERNAL_API is defined
|
|
#if defined(MOZILLA_INTERNAL_API) || defined(XP_WIN)
|
|
|
|
// Save literal putenv string to environment variable.
|
|
MOZ_NEVER_INLINE inline void SaveToEnv(const char* aEnvString) {
|
|
# if defined(MOZILLA_INTERNAL_API)
|
|
char* expr = strdup(aEnvString);
|
|
if (expr) {
|
|
PR_SetEnv(expr);
|
|
}
|
|
|
|
// We intentionally leak |expr| here since it is required by PR_SetEnv.
|
|
MOZ_LSAN_INTENTIONALLY_LEAK_OBJECT(expr);
|
|
# elif defined(XP_WIN)
|
|
// This is the same as the NSPR implementation
|
|
// (Note that we don't need to do a strdup for this case; the CRT makes a
|
|
// copy)
|
|
_putenv(aEnvString);
|
|
# endif
|
|
}
|
|
|
|
inline bool EnvHasValue(const char* aVarName) {
|
|
# if defined(MOZILLA_INTERNAL_API)
|
|
const char* val = PR_GetEnv(aVarName);
|
|
return val && *val;
|
|
# elif defined(XP_WIN)
|
|
// This is the same as the NSPR implementation
|
|
const char* val = getenv(aVarName);
|
|
return val && *val;
|
|
# endif
|
|
}
|
|
|
|
#endif // end windows/internal_api-only definitions
|
|
|
|
#ifndef NS_NO_XPCOM
|
|
already_AddRefed<nsIFile> GetFileFromEnv(const char* name);
|
|
#endif
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_CmdLineAndEnvUtils_h
|